Printing-plate holder.



PATENTED JULY 28, 1908. 'W. J. KNOLL. PRINTING PLATE HOLDER.

M1207? ifikikv T133425 my" APPLICATION FILED MAY 12, 1908.

UNITED smirn sgngrnnr oFFIcn.

WILLIAM J. KNOLL, or CHICAGO, ILLINOIS, ASSIGNOR r H. B. house i COMPANY, or CHICAGO, ILLINOIS, A CORPORATION'OF ILLINOIS.

PRINTING-PLATE HOLDER.

Specification of Letters Patent.

Patented July 28, 1908.

Application filed May 12, 1908. serial No. 430,459.

T 0 all whom it may concern: Be it known that 1, WILLIAM J. KNOLL, citizen of the United States, residing at Chi cago,-in the county of Cook and State of Illi- Y nois, have invented a certain new and useful .of the invention, and which will be pointed nutin the appended claims.'

In the drawingFigure 1 is a plan view. F 2 is an end view. Fig. 3 is a sectional view on line 3 3 of Fig. 1. Fig. 4 is a sectional view on line 4 4 of Fig. 3. Fig. 5 is an end view showing an operating tool in position. Fig. 6 is a view of the structure with the parts disassembled. Fig. 7 is an end view'of the traveling jaw structure. Fig. 8 is a sectionaLview of the travelin ja-wstructure and the threaded shaft, the block being omitted. Fig. 9 is a view in perspective of the structure shown in Fig. 8, with the exception that the rear port-ion of the shaft in Fig. 9 is broken away.

.Like parts are indicated by similar charac ters of reference throughout the different figures.

The plate holder, which includes novel features of my present invention, forms the subject matter of my application for United States Letters Patent Serial N 0. 418,415, filed February 29, 1908', though the features of novelty of my present invention are not to be restricted to the structure of my aforesaid coending application.

he plate holder illustrated includes a block a whose end wall I) is desirably made substantially thick, which end wall is provided with a threaded bore 0 adapted to receive the threaded rotatable adjusting shaft (1. The opposite end of the block ,a. is pro-- within the recess '2. T e base g of the jaw conforms in shape to the curvedportion of the recess e and has a nice sliding fit in said curved portion of the recess 6 so that the traveling jaw f may have ample support, in the event of such formation of the base of the jaw that makes said base conform substantially throughout in shape to the curved portion of the recess e. The threaded shaft d is rovided withan annular recess it, into whic recess there extends-a projection or key 1; carried by the base g of the hook f. The shaft of is provided with a suitable formation in the form of a radially recessed head 01, which head may be engaged by a suitable tool in order that the threaded shaft (1 may be rotated within thethreaded bore 0, thereby longitudinally to move the shaft with reference to the block a, the hook f and its base mov'ing longitudinally withthe shaft owing to the en agement of the projection i carried by t e hook base with the annular groove h. The base of the hook f is provided with a circular opening through which thethreaded shaftmay freely ass, and the projection or key t is separate y associated with the base of the hook, this projection 71 being a segment of a ring whose outer peri hery conforms in shape to the bottom of tie recess e and whose innerperiphery conforms in shape to the bottom surface of the annular recess h. The bottom of the hook base is provided'with a slot k for the purpose of re-- ceiving the ring segment i.

""In assembling the parts, the ring se ment i is out of place, so that the threaded shaft d may be passed through the circular opening in the base 9 of the hook f until the annular recess h in the same plane with the slot 7r, whereupon the ring segmenti is inserted into the slot 7c and enters the annular recess h,-. whereafter the parts thus united are inserted longitudinally within'the recess 6, whereupon the threaded shaft d may be engaged with the threaded bore a by rotation of said shaft. Any rotary movement of the parts thus associated will effect a longitudinal movement of the hook f with its base.

Having now describedone of several types of printing plate holders to which my invention is ada ted, I will now-describe the novel features 0 my invention.

The block a is usually made of brass, while the threaded shaft d isusually made of casehardened steel. As a consequence, the threads in the endwall b of the block a are in with the material of the block a, said bushing or lining having a driving-fit within the end wall I) and being provided with the interior threads, whereby the shaft d is afforded threaded engagement with said end wall.

I The metal of which the bushing Z is made is preferably case-hardened steel. If it should ap en that the bushing became worn, it cou d be removed and a fresh one inserted in its place, thereby restoring the structure to its original condition;

It is now the best practice to provide the wheels which effect the travel of the jaws of printing plate holders with radially disposed recesses that extend diametrically across the wheels, so that an operating lever (m) may be projected clear across a wheel it engages, this being the construction of such Wheels whether the rotating shaft moves longitudinally or not, a printing plate holder with a longitudinally moving shaft being illustrated 1n the present drawing, while a rotating shaft which is not longitudinally movable is well known. It has also been the practice to provide such diametrically extending recesses in the body of the shaft itself, as, for example, in the construction of Patent N 0. 843,648, issued February 12, 1907 to T. I/Vensel. I have found that in practice the operating bar (m) by projecting diametrically across the shaft or shaft head, frequently injures the bore of theblock in which said shaft is disposed, this being particularly' thecase if the inner, end of the operating bar (m) has become broken, the broken end of the bar gouging the block, and in course of time rendering it unfit for further use. I provide means for protecting the block against the injurious action of the operating tool, which means resides in a segment n interposed between the head d of the shaft, or the slotted portion of the shaft, and the bore of the lock, this segment being preferably carried by, and desirably integrally formed with, the jaw f, so that as said jaw progresses, the guard nis ever present between the lower end of the tool m and the bore wall of the block a. The jaw f and the segment a are made of steel and said protecting segment is, the're-' fore," not so liable to injury by the engagement of the tool m therewith, owing to the fact that it is made of non-wearing metal as compared with the material of the block a. The guarding segment n thus prevents the tool m from doing material injury to the structure. The segment a surrounds a considerablev portion of the shaft head (i and -materially enlarges the surface of the base of the jawwhere said base engages the bore of the block a, thereby better maintaining the jaw and its base in proper relation to the block.

While I have shown the guarding segment a as moving with the jaw, I do not wish to-be limited to this characteristic in all embodiments of the invention, as I consider it to be broadly new with me to interpose a nonwearing metal between the operating tool 'mand the material of the block a to prevent said tool from injuring said block.

The remaining feature ofmy invention relates to the cooperative relation between the operating wheel (Z and the jaw whether or not such wheel is integrally formed. with the shaft and whether or not the wheel rotates with or withrespect to said shaft, this condition of plate holders being well known by those skilled in the art. It is the. object of this feature of my invention to make the jaw as long as may be desired without sacrificing the narrowness of the space between adjacent jaws ong to prevent them from digging into the metal of the plates that they engage; but this result should not be gained at the expense of broadening the space between adjacent plates. In practicing the )rcsent feature of my invention, I make the rear faces of the shaft (or wheel (1 and the jaw lie substantially in the same plane, this relation between the shaft portion (1 and the jaw of the hook being maintained, inasmuch as the said jaw and the portion d travel together. The jaw f has a central rear portion removed, as indicated at o, in order to'exose a portion of the periphery of the element 5 which is provided with suitable recesses for engagement with an operating tool (m), which recesses desirably extend diametrically across the whecl (1 While the rear portion of the wheel d is provided with the tool-engaging recesses, the forward portion of said wheel is solid and is overhung by the jaw including the central portion of the jaw, the metal intervening between the central portion of the jaw and the head al being sufficient to maintain the strength of the jaw and to e able the jaw to extend sub stantiallyc'on, inuously from one side of the block a to the other, whereby said jaw may be made of sufficient length proper gage the plate o be held, without digging into the same.- The space removed. from the rear of the jaw is of suflicient extent to. pery to en plates. It is important to have the v mit of the swing of the operating too 1a through an angle sufficient to rotate the wheel cl to present a fresh recess for engagement with the operating tool.

In the preferred embodiment of theinvention, the forward portion of the jaw is continuous from end to end, but I do not wish to be limited to this characteristic in all emb'odiments of the invention.

It-will' be seen that I have provided a 'ing a recess therein open at the to printing plate holder including a block havof the block, atraveling jaw moving abovet 1e top of the block, and mechanism for effecting the travel of the jaw, said mechanism includinga rotating body traveling in said recess and moving longitudinally back and forth with the jaw and provided with recessesfor the reception of an operating tool which is insertible,transverse to the plate to be held, through the opening provided in the to of the block and into the recess in which t e rotating body works, the rear portion of the jaw between the ends of the jaw being removed, the space thus afforded at the rear of the jaw being between rearwardly extending end portions of the jaw and being sufliciently long to permit the operatingtool to turn the rotating body sufficiently-to resent successive recesses in the rotating bo y (whose recesses are the plane of said space) to the operating tool, the forward portion of the jaw being substantially continuous from end to end, whereby a desirable extent of the jaw is resented for engagement to the. late to be eld.

By the expression transversely to the plate to be held I mean that the tool is adapted for insertion in a plane which is angular to the face of the plate.

While I have herein shown and particularly described the preferred embodiment of my invention, I do not Wish to be limited to thea precise construction shown, as changes may readily be made without departing from the spirit of my invention, but,

Having thus described my invention, I claim as new and'desire to.secure by Letters Patent the following:-

1. A printing plateholder including a block having a recess therein open at the top of the block, a traveling jaw moving above the top of the block, mechanism for effecting the travel of the jaw, said mechanism including a wheel or rotating bod'y rovided with'a plurality of intersecting s ots extending diametrically across its outer vertical face and working within said recess, the tool for engaging the slots in the rotating body being insertible in a vertical direction through the opening provided in the top of the block and into the recess in which the rotating body works, and a guard interposed between the said rotating body or wheel and the surface of said recessto prevent the operating tool from directly engaging the material of the block.

2. A printing plate holder'including a block having a recess therein open at the top of the block, a traveling jaw moving above the top of the block, mechanism for eflecting the travel of the jaw, said mechanism including a wheel or rotating body rovided with a plurality of intersecting slhts extending diametrically across its outer vertical face and 55 working said recess the tool forengaging the slots in the rotating body being insertible in a vertical direction through the opening provided in the to of the block and into the recess in which t e rotating body works, and a guard interposed between the said rotating body or wheel and the surface of said recess to prevent the operating tool from directly engaging the material of the block, said'guard and wheel or rotating bod moving longitudinally back and forth'witli the jaw. v 3. A printing plate holder including a block having a recess the rein open at the top of the block, a traveling jaw moving above the top of the block, and mechanism for effecting the travel of the jaw, said mechanism includin a rotating body travelingin said recess and moving longitudinally back and forthwith the j aw and provided with recesses tor the reception of an o crating tool which is insertivble, transverse y to the plate to be held,

cesses in the rotating body (whose recesses are in the plane of said space) to the operattool, the forward portion of the jaw being 1n suistantially continuous from end to end,

whereby a desirable extent of the jaw is preseiliaed for engagement to the plate to be he Y Y 4. A printing plate holder including a block having a recess therein open at the top of the block, a traveling aw movin above the top of the block, and mechanism for effecting the travel of the aw, said mechanism includin a rotating body traveling in said recess an moving longitudinally back and forth with the jaw andprovided with recesses for the reception of an operating tool which is insertible, transversely to the plate to be held, throu h the opening provided in the top of the bfoek and into the recess in which the rotating body works, the rear portion of the jaw between the ends of the aw being removed, the space thus afi'orded at the rear of the aw being between rearwardly extending end portions of the jaw and bein sufliciently long to permit the operating too to turn the rotating body suflicie-ntly to present successive recesses in the rotating body (whose recesses are in the plane of said space) to the operating tool, t e forward portion of the jaw being substantially continuous from end to end, whereby a desirable extent of the jaw is resented for engagement to the plate tobe eld.

5. A printing plate holder including a block having a recess therein open at the top of the block, a traveling jaw movin above the top of the block, and mechanism %or effecting the travel of the jaw, saidmechanism including moving'lon itudinally back and forth with t the jaw an provided with recesses for the rece tion of an operating tool which is inserti 1e, transversely to the plate to be held, through the opening provided in the top of the block and into the recess in which the rotating body works, the rear of said rotating body and aw being substantially in the same plane, the rear portion of the jaw between the ends of the jaw being removed, the space thus afforded at the rear of the aw being between rearwardly extendin end portions of the aw and being suflicient ly long to permit the operating tool to turn the rotating body sufficiently to present successive recesses in the rotating body (whose recesses are in the plane of said space) to the operating tool.

6- 'Q-A printing plate holder including ablock liaving a recess therein open at the top of the block, a traveling jaw moving above the top of the block, and mechanism for eliecting th" travel of the aw, said mechanism meludm a rotat ng body traveling 111 said recess and moving longitudinally back and forth with j the jaw and provided with recesses for the a rotating body traveling in said recess and l rece tion of an operating tool which is inserti le, transversely to the plate to be held,

through the opening provided in the top of the block and into the recess in which the retating body works, the rear portion of the jaw between the ends. of the jaw being removed, the space thus allorded at the rear of the jaw being between rearwardly extending end portions of the aw and being sufliciently long to permit the operating tool to turn the rotating body sufliciently to present successive recesses in the rotating body (whose rccesses are in the plane of said space) to the operating tool.

In witness whereof, I hereunto subscribe my name this 30th day of April A. 1)., 1908.

WILLIAM J. KNOLL.

Witnesses:

G. L. CRAGG, L. G. STROH. 

